On Wed, 20 Sep 2000 12:32:51 -0500 "rb" <rbigg@pcola.gulf.net> writes:
>
>Concerning the Jennings UCSL-1000 series of vacuum variable capacitors:
>some come configured with vertical pull tuning. Others have shaft
drives.
>Upon closer examination, the shaft drive units appear to be conversion
>vertical pull units, as the bell and shaft can be removed, and you are
left
>with a vertical pull unit. Are all the UCSL-1000 series basically
vertical
>pull configuration? If so, are conversion parts available from Jennings
to
>switch the units from vertical pull to shaft drive? Just curious. My
only
>contact and experience with vacuum variables has been recent, and I have
two
>different units, both of which appear to be basically vertical pull,
with
>one converted to shaft drive. Just seeking to increase my state of
>knowledge. Vacuum variables have been around for years, and so have I.
>But, our paths have never converged until recently, for some reason.
>
>73 de Ron, K5BDJ
>
Hi Ron,
Yes, those caps are all intrinsically "straight" pull.
The standard part from Jennings included the bell & screw drive
assembly.
There are several custom variations wandering around which may or may
not accept the standard ¼" drive. A lot of those have shown up on the
surplus market in the past couple of years... same thing happened in the
late 60's -- does it coincide with the sunspot cycle?
Loose drives show up occasionally at hamfests, or on e-bay, but, they
are typically much rarer than the capacitors.
73,
Marv WC6W
*
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